export interface FrustrationState {
    navTimestamps: number[];
    cooldownUntil: number;
    errorPageUrls: string[];
    dismissedByUser: boolean;
}
export declare function loadFrustrationState(): FrustrationState;
export declare function saveFrustrationState(state: FrustrationState): void;
export declare function isFrustrationDismissed(): boolean;
export declare function markFrustrationDismissed(): void;
export declare function clearFrustrationState(): void;
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